Forum: Photography


Subject: Upsizing - still need help please

ejn opened this issue on Jan 27, 2007 ยท 5 posts


girsempa posted Sat, 27 January 2007 at 11:12 AM

Yes Eddie, the JPEG compression makes the file size on your hard disk much smaller, but when you open it in Photoshop, the document size in Photoshop will still be the same large size. Just try this: if you save the image as a TIFF file, and you choose Image Compression "NONE", you'll see that the file size of your saved image on your hard disk will be approximately the same (uncompressed) size as in your Photoshop document. That is because 'uncompressed TIFF' is a 'lossless' image format, whereas JPEG is a 'lossy' image format, that is, it looses image information when saved as JPEG. That's why Alamy asks you to save your image at the highest quality JPEG compression (10 or more), otherwise it will loose too much image information. I hope this explanation is useful and not too 'blurry' ;o)) Remember you can always ask away.... __/ Geert


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